Aguilar OBP-3 2-Pickup 4-Knob 3-Band Vol - Bl - Mid P/P - Treb/Bass Stack

SKU:BBG 1423


  • 3-Band: 2-Pickup, 4-Knob
  • Vol - Bl - Treb/Bass Stack - Mpp
In Stock - Made to Order

We build and test our pre-wired preamp assemblies by hand. These usually ship within a few days. Please contact us first if you have a tight deadline. We will do our best to accommodate you.


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Control Configuration

  1. Volume
  2. Blend
  3. Treble/Bass stack
  4. Mid Push-Pull


The Aguilar OBP-3 was built from the ground up to be the ultimate source of full-bodied tone, transparency, and versatility for your bass.

Three bands of boost/cut and a selectable midrange frequency provides flexibility to dial in just the right tone. The treble control delivers up to 16dB of boost/cut at 6.5Hz and captures the dynamic of a "Passive Tone Control" when rolled off. The powerful midrange control offers user selectable frequencies of 400 or 800Hz, each with a full 16dB boost/cut capability. The midrange retains constant bandwidth in any setting so there is no "muddy" frequency overlap. The bass control features a boost/cut of up to 18dB at 40Hz, adding Aguilar's signature thickness to any instrument.

The Aguilar OBP3 is compatible with most major manufacturer’s pickups both active such as EMG®, Warwick® MEC, and passive as we build them in house and impedance match the controls, and its small size makes it an easy retrofit in almost any bass. Combining high headroom and low noise, the OBP-3 is unmatched in providing tonal flexibility while retaining the true character of any bass!

Tonally these preamps are aggressive, clear, transparent and have emphasis with the low and low midrange being warm, and with the top end 'presence' like. These preamps do not have gain control onboard.

Use of 9v or 18v power is possible as we build the prewires in house to suit your power requirements. 18v grants an additional 6dB of headroom.

Technical Specifications

  • Bass: +/- 18dB @ 40Hz
  • Midrange: +/- 16 dB @ 400Hz or 800 Hz. User selectable frequency center.
  • Treble: +/- 16dB @ 6.5 KHz
  • Input Impedance: 1 Mega Ohm
  • Output Impedance: 100 Ohm
  • Battery life: Estimated 324 hours


Rate and Review this item
Verified Buyer
Excellent pre-amp
By Slade Kennedy from on 5/23/2016
I wanted to upgrade my pickups in an Ibanez SR305 and realized it would necessary to upgrade the pre or not get 100% out of the upgrade. I could have just bought an Aguilar Tone Hammer pedal, but why not just upgrade the pre. This upgrade with the Bartolini pickups is ridiculous and meaty. Don't hesitate to buy.
Verified Buyer
Great preamp
By Robert from on 5/12/2016
Great preamp, small footprint that will fit in most of the cavities you'll find I'm sure. Easy to install, great flexibility in tone capabilities.